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Q.

A satellite with kinetic energy Ek  is revolving round the earth in a circular orbit. How much more kinetic energy should be given to it so that it may just escape into outer space

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a

12Ek

b

3 Ek

c

2 Ek

d

Ek

answer is A.

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Detailed Solution

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Binding energy = – kinetic energy
And if this amount of energy  (Ek) given to satellite then it will escape into outer space

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